In March 2000 the Air Resources Board (ARB) approved the Enhanced Vapor Recovery (EVR) regulations which became
effective on April 1, 2001. The purpose of the EVR regulations is to improve the reliability and durability of
in-use vapor recovery systems for gasoline dispensing facilities with underground storage tanks. Vapor recovery
systems for above ground gasoline storage tanks (ASTs) were not included in the development of EVR regulations and
therefore the EVR regulations do not apply to AST vapor recovery systems. The ARB intends to apply EVR improvements
to AST vapor recovery systems through a new rulemaking process. In the interim, the ARB staff plans to use the
written procedure for evaluating and certifying AST Phase I and Phase II vapor recovery systems. These interim
requirements are based on currently adopted certification and test procedures for ASTs.

The purpose of this workshop is to accomplish two goals. The first is to announce the start of a new rulemaking
process for ASTs and to solicit public input in the development of the new certification and test procedures for
AST vapor recovery systems. The second goal is to discuss and receive comments on the enclosed draft written
procedures. The draft written procedures can be downloaded from our website at www.arb.ca.gov/vapor/ast/ast.htm
after June 4, 2001. Alternately, a hardcopy may be obtained by calling (916) 327-0900.

The workshop facility is accessible to persons with disabilities. If accommodations are needed, please contact
Ms. Elizabeth Mongar at (916) 327-0900 by June 14, 2001. Persons with hearing or speech impairments can contact
us by using our Telephone Device for the Deaf (TDD) at (916) 342-9531, or (800) 700-8326 for TDD calls from
outside the Sacramento area. If you have questions or need further information, please contact Pat Bennett at
(916) 445-9308 or Joe Guerrero at (916) 324-9487.

We invite your participation at the June 21, 2001, workshop. If you cannot attend the workshop and would like
to provide comments, or if you have questions regarding this workshop, please call Mr. Pat Bennett at (916) 445-9308,
or pbennett@arb.ca.gov or Mr. Joe Guerrero at (916) 324-9487 or jguerrer@arb.ca.gov.

Sincerely,

INTERNET VERSION

William V. Loscutoff, Chief
Monitoring and Laboratory Division

The energy challenge facing California is real. Every Californian needs
to take immediate action to reduce energy consumption. For a list of simple ways you can reduce demand and
cut your energy costs, see our Website:
http://www.arb.ca.gov.